package lesson4_2;

public class Demo1 {
    public static void main(String[] args) {
        Student student = new Student();
        student.setAge(20);
        System.out.println(student.getAge());
        //student.set

        Teacher teacher = new Teacher();
        //teacher.setB
        Driver driver = new Driver();
        //driver.setB
        //driver.set
    }
}
